Septic Tanks

31 January 2024 – 3 Minute Read

A septic tank is a large underground container made from glass, reinforced plastic or high density polyethylene that partially treats and stores sewerage and waste water. Septic tanks are most common in properties that are not connected to a mains sewerage system. A septic tank uses gravity to separate solid and liquid waste that comes into it from a connected property. Lighter waste floats to the surface while heavier soiling sinks to the bottom. Waste is then broken down by anaerobic bacteria. The liquids in between the sludge layer at the top and bottom flow out of the tank and into the surrounding soil area, which is known as a septic soakaway. A septic tank needs to be watertight and airtight.